1920] Richmond, Studies on the Biology of the Aquatic Hydrophilidce 93 



Schwarz, E. A. 1914. Aquatic beetles, especially Hydroscapha in Hot Springs, 

 in Arizona. Proc. Ent, Soc. Wash., XVI, pp. 163-168. 



Scott, Hugh. 1913. Coleoptera, Hydrophilidse. Trans. Linn. Soc. London, XVI, 

 (part 2, Xo. X), pp. 193-222, PI. xiv (Fig. 22). 



Sharp, D. 1S95. On three new species of Hydrophilidse. Ent. Month. Mag., XI, 



pp. 247-250. 

 1887. Hydrophilidse. Biol. Centr. Amer., 1882-1887, I, part 2, pp. 53-116, 



Pis. II-III. 

 1899. Hydrophilidse. Cam. Nat. Hist., London, V, pp. 216-219. 



Steix, Frederick. 1847. Die weibliche Geschlechtsorgane der Kafer, Berlin, IV, 

 pp. 33-34, III, d.h. 



Voss, Frederick. 1905. Uber den Thorax von Gryllus domesticus. Zeit. fur wissen- 

 schaft., LXXVIII, pp. 290-293. 



Ward, JohxJ. 1914. Some new discoveries in natural history. A tool using insect. 

 Strand Mag., XLVIII, pp. 523-525, Figs. 1-5. 



Wesexberg-Ltjxd, Carl. 1915. Vandkaerer (Hydrophilidse). Insekstlivet i 

 ferske vande., pp. 270-299, Figs. 223-244. 



Wickham, F. H. 1S93. Tropisternus glaber, metamorphosis. Bull. Lab. Nat. 

 Hist., Iowa, II, pp. 228-341, PL ix, figs. 13-15. 

 1895. On the larvse and pupse of Hydrocharis obtusatus Say. Ent. News, VI, 

 pp. 168-170, PI. vi, fig. 1 (6). 



Wixtersteixer, Fred. 1913. Environment of Hydrophilidse. Journ. New York 

 Ent. Soc, XXI, pp. 54-55. 



Zaitzev, Ph. A. 1908. Catalogue of Hydrophilidse. Horse Soc. Ent. Ross., XXX- 

 VIII, pp. 324-418. 



Zambeu, Captaix. 1894. Mceurs et metamorphoses d'insectes. Hydrophilides. 

 5th-6th Mem. Ann. Soc. Linn, de Lyon, (n. ser.) XLI, pp. 132-135; 

 XLII, pp. 25-42. 



